According to a blogpost by former EA developer Adam Berg, different teams take very different approaches to development with one team in particular being especially slow to progress.
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The C4 Model for Software Architecture
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Key Takeaways
The creation of software diagrams has been scaled back as a result of the shift to agile methodologies. When diagrams are created, they are often confusing and unclear.
The C4 model consists of a hierarchical set of software architecture diagrams for context, containers, components, and code.
The hierarchy of the C4 diagrams provides different levels of abstraction, each of which is relevant to a different audience.
Avoid ambiguity in your diagrams by including a sufficient amount of text as well as a key/legend for the notation you use.
Software architecture diagrams are a fantastic way to communicate how you are planning to build a software system (up-front design) or how an existing software system works (retrospective documentation, knowledge sharing, and learning).